The Witch's Revenge by D.A. Nelson

Two months after she saved the Eye of Lornish, a large white stone that prevents the magical kingdom of Mor from being discovered, Morag is adjusting to life in the secret northern kingdom. But dark dreams trouble her, and a series of unsolved robberies proves that even with the protection of her friends—Shona the dragon, Bertie the dodo, and Aldiss the rat—Morag is still not safe.

D. A. NELSON was born in Glasgow, grew up in Neilston, and currently lives in Cardross, Scotland. The DarkIsle books were inspired by a huge stone dragon, created by Roy Fitzsimmons, that overlooks Irvine Beach on Scotland's west coast.